With LEDs that require only one pin, you can do a lot with even just a 6-pin microcontroller!
A touch controlled light with 4xWS2812 RGB LEDs and ATtiny10. This is a small hardware project which utilizes the light_WS2812 library and the TinyTouchLib to implement a touch-button controlled RGB-LED light. Only two output pins of the ATtiny10 are used. Atmel Studio project and Eagle files are included.
[via]
Tiny Touch Button - [Link]Original article at http://www.electronics-lab.com/blog/?p=22132.

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